According to WHO leprosy is a public health problem if prevalence is more than
**Question:** According to WHO, leprosy is a public health problem when the prevalence is more than
A. 1 case per 10,000 population
B. 1 case per 10,000-100,000 population
C. 1 case per 100,000 population
D. 1 case per 100,000-1,000,000 population
**Correct Answer:** C. 1 case per 100,000 population
**Core Concept:** Leprosy is a chronic infectious disease caused by Mycobacterium leprae and Mycobacterium lepromatosis. It primarily affects the skin, nerves, and mucous membranes. Leprosy is classified into two main groups: tuberculoid (TT) and lepromatous (LL). The World Health Organization (WHO) defines leprosy as a public health problem when its prevalence is more than one case per 100,000 population.
**Why the Correct Answer is Right:** According to the WHO guidelines, if the prevalence of leprosy exceeds 1 case per 100,000 population, it is considered a public health problem. This threshold helps policymakers and healthcare providers prioritize resources, surveillance, and intervention strategies to control the disease and reduce its impact on affected communities.
**Why Each Wrong Option is Incorrect:**
A. 1 case per 10,000 population: This number is too low, and a prevalence of 1 case per 10,000 is not considered a public health problem.
B. 1 case per 10,000-100,000 population: Although this range is between the correct answer, it is still too broad, making it less useful for decision-making by public health authorities.
D. 1 case per 100,000-1,000,000 population: This range is too wide, and the WHO guidelines suggest a more specific threshold for public health action.
**Clinical Pearl:** The correct answer, 1 case per 100,000 population, is crucial for public health professionals to effectively identify, diagnose, and treat leprosy cases, as well as implement control measures to prevent the spread of the disease and reduce its impact on communities. Early detection and treatment are essential for preventing disabilities caused by leprosy, as it can lead to irreversible nerve damage if left untreated.